ATOM
Atom comes from the Greek " atomos " which means it can not be cut . As per this definition , atoms are all the constituent particles are very small objects . In the atom also contained sub - atomic , subatomic particles that are smaller in size . It is difficult for us to imagine how small this atomEach atom has a nucleus , composed of protons and neutrons , and electrons are moving fast around the nucleus . These electrons are in the energy levels of different , called skins , each skin has a limit to the number of electrons , where electrons in the first shell already meet the limits , then the electrons will meet a second skin and so on .
1 . Atomic theory of John DaltonIn 1803 , John Dalton argued pendapatnaya argued about atoms . Dalton's atomic theory is based on two laws , the law of conservation of mass ( Lavoisier law ) and legal permanent arrangement ( legal Prouts ) . Lavosier that voiced their " total mass of substances before the reaction will always be equal to the total mass of substances reaction products " . While Prouts stated that " the mass ratio of the elements in a compound always remains " . The second law of Dalton expressed his opinion about the atom as follows :1 . Atoms are the smallest part of the material as it can not be subdivided2 . Atoms described as a very small solid ball , an element has atoms are identical and differ for different elements3 . Atoms combine to form compounds with a ratio of integers and simple . For example, water is composed of hydrogen atoms and oxygen atoms4 . The chemical reaction is a separation or merger or rearrangement of atoms , so the atoms can not be created or destroyed .Hypothesis Dalton 's atomic model as illustrated by the solid ball as the shot put . As shown below :
dalton atomic model
weaknesses :
Dalton theory does not explain the relationship between the solution and the compound electric current conductivity .
Atom comes from the Greek " atomos " which means it can not be cut . As per this definition , atoms are all the constituent particles are very small objects . In the atom also contained sub - atomic , subatomic particles that are smaller in size . It is difficult for us to imagine how small this atomEach atom has a nucleus , composed of protons and neutrons , and electrons are moving fast around the nucleus . These electrons are in the energy levels of different , called skins , each skin has a limit to the number of electrons , where electrons in the first shell already meet the limits , then the electrons will meet a second skin and so on .
1 . Atomic theory of John DaltonIn 1803 , John Dalton argued pendapatnaya argued about atoms . Dalton's atomic theory is based on two laws , the law of conservation of mass ( Lavoisier law ) and legal permanent arrangement ( legal Prouts ) . Lavosier that voiced their " total mass of substances before the reaction will always be equal to the total mass of substances reaction products " . While Prouts stated that " the mass ratio of the elements in a compound always remains " . The second law of Dalton expressed his opinion about the atom as follows :1 . Atoms are the smallest part of the material as it can not be subdivided2 . Atoms described as a very small solid ball , an element has atoms are identical and differ for different elements3 . Atoms combine to form compounds with a ratio of integers and simple . For example, water is composed of hydrogen atoms and oxygen atoms4 . The chemical reaction is a separation or merger or rearrangement of atoms , so the atoms can not be created or destroyed .Hypothesis Dalton 's atomic model as illustrated by the solid ball as the shot put . As shown below :
dalton atomic model
weaknesses :
Dalton theory does not explain the relationship between the solution and the compound electric current conductivity .
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